Response of Different Dietary Energy and Protein Combinations on Growth Performance of Broiler Starters (original) (raw)
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Effect of altering the starter and finisher dietary phases on growth performance of broilers
African Journal of …, 2011
The current study was conducted to determine the effect of altering a starter and finisher diets of a three-phase commercial feeding program on growth performance and feed conversion efficiency (FCE) of broilers in a small-scale production system. A total of 2400 unsexed day-old chicks of commercial strain (Cobb 500) were housed in an open-sided house and randomly allocated to the following three treatments. Body weight (BW) and feed intake (FI) were recorded weekly starting from weeks 3 to 5. The BW, FI and the FCE were computed for each week. At week 5, the broilers on T 2 were heavier (P<0.05) than T 1 and T 3 birds and T 1 birds were heavier (P<0.05) than T 3 birds. Treatment effects (P<0.05) were observed on FI and BW at some stage of growth, as well as on FCE at all the stages of growth. It was concluded that altering dietary starter phases promised optimum production in birds fed starter diets, 0 to 15 days with feed cost per kilogram being better compared to birds fed starter diets, 0 to 18 days and starter diets, 0 to 21days.
Effect of various protein source feed ingredients on the growth performance of broiler
The study was conducted to evaluate the growth performance of broilers in response to various percentages of animal protein (A.P) and plant protein (P.P) feed ingredients, kept at SAU, Tandojam. One hundred twenty 120 day old mixed chicks (male and female) were purchased for 42 days. Initially weighed and randomly divided in to 4 equal groups i.e. A, B, C, and D, each group having 30 chicks. They were fed different rations containing various percentages of A.P and P.P feed ingredients sources. Group A containing 20% A.P and 80% P.P (control), while group B, C and D were given 30/70, 40/60, and 50/50 percentages of A.P and P.P feed ingredients, respectively. It was noted that the different percentage of (A.P and P.P) animal protein and plant protein sources have significant (P<0.05) effect on the growth and economic parameters of broiler, but non-significant effect on edible and non-edible internal organs. The feed intake of broiler in groups A, B, C and D was 4203.37, 4240.21, 4283.98 and 4396.62 g/b; water intake (P<0.05) of broiler was 9.46, 9.51, 10.06 and 10.45 liter/b, respectively. Average live body weight (P<0.05) of broilers in groups A, B, C and D was 1896.25, 1952.39, 2022.32 and 2116.97 g/b; Feed conversion ratio was 2.03, 1.99, 1.93 and 1.84. Average carcass weight was 1138.80, 1176.60, 1252.20 and 1313.60 g/b; dressing percentage was 60.12, 61.88, 62.57 and 63.22; heart weight was 10.60, 11.00, 10.80 and 10.20 g/b; gizzard weight 56.40, 57.40, 58.80 and 59.20 g/b; liver weight 36, 38.40, 38.80 and 39 g/b and intestine weight 132.90, 137.20, 138.60 and 143.40 g/b, respectively. With increasing protein ratio of animal protein in broiler ration, there was significant (P<0.05) increase in feed and water consumption of broiler. It was observed that animal protein and plant protein percentages of 50:50% proved to be the most effective to increase broiler live body weight, improve feed conversion ratio, carcass quantity as well as net profit per broiler basis. However, there was no association of animal protein and plant protein source on the mortality rate of experimental broiler. It was concluded that 50:50 percentages of A.P and P.P feed ingredients could be considered as an optimum ratio for better broiler growth and economic profitability
Effect of Dietary Protein/Energy Combinations on Male Broiler Breeder Performance
Acta agriculturae …, 2008
A study was conducted to evaluate the effect of crude protein level and low energy supply on broiler production parameters. Three hundred Ross 308-day-old male broiler chicks were divided in three basic groups and placed in three separate pens littered with wood shavings. Treatments consisted of a control diet (220 g/kg CP), the second diet with a crude protein diet (205 g/kg CP), and the third one with a crude protein diet (190 g/kg CP) with the same ratio 1: 573-575 KJ/kg crude protein and ME in starter (first 21 days). Finisher (22 day till end) control diet consisted of 200 g/kg CP, the second diet consisted of 185 g/kg CP, and the third one of 170 g/kg CP, with the ratio 1: 649-650 KJ/kg crude protein and ME. Feed intake tended to decrease with increasing the crude protein and energy. Feed conversion (g gain per g feed) improved as crude protein and energy increased. Muscle amount in groups K and P 1 was statistically much higher (P < 0.01) than in group P 2. Concentration of biochemical indicators showed less organism strain in groups fed on blends with less crude protein and energy.
Indian Journal of Animal Research, 2019
Present study was conducted to evaluate the different levels of energy to protein ratios (EPR) using food waste and black soldier fly larvae meal (FWBSFL) on growth performance and nutrient digestibility of broilers. A total of 160 one-day old broiler chicks were divided randomly to four groups and each group had 8 replicates with 5 chicks per replicate. The control diet was formulated using conventional feed ingredients with EPR of 154 for the starter period and 167 for the finisher period. The other treatments were diets with normal, low, and high EPR (154,143, and 166 for the starter period; 167, 155, and 177 for the finisher period) using FWBSFL. Feed consumption and body weight gain as well as digestibility of crude protein, crude fiber, and fat were decreased due to feeding of FWBSFL diets. Different levels of EPR using FWBSFL decreased growth performance and nutrient digestibility of broilers.
Hassan M. Abdel-Hafeez, Elham S. E. Saleh, Samar S. Tawfeek, Ibrahim M. I. Youssef *, Manal B. M. Hemida, 2016
This study was conducted to investigate the effect of high metabolizable energy diets with normal or wide metabolizable energy to crude protein ratios (ME:CP) on the performance, carcass characteristics, body composition and blood parameters of broilers fed from 1 to 56 days of age. The chicks were allotted into 7 groups; one control and 6 tested. The birds were fed starter, grower and finisher diets. The control diet was formulated according to the NRC of poultry (1994) and the other six diets contained three different levels of high energy diets (3275, 3350 & 3425 kcal/kg; one level for each two groups). The first three tested groups were pointed for as the ''normal calorie-protein ratio” groups in which the CP increased in relation to the increased ME, keeping the normal NRC ratio. In the second three tested groups, named “wide calorie-protein ratio” groups, the dietary protein was kept at the NRC levels leading to ratios wider than that of the NRC. Results showed that chicks fed high ME diets with normal energy to protein ratio grew faster, and used feed more efficiently than chicks fed the control diets. However, feeding diets with high ME and normal protein NRC-levels slightly improved the weight and feed conversion. The visible fat and fat retained in the body was higher in all tested groups compared to the control. However, the blood parameters had no significant variations among the treatments, except for ALT which had an increased response to increased dietary energy density. In conclusion, increasing the dietary ME level without increasing the crude protein level provided moderately economic returns and lesser improvement in the performance of broilers. However, increasing of dietary ME with normal ME:CP ratio resulted in increased broiler performance and higher economic return.
IOSR Journals , 2019
Poultry development plays a crucial role in increasing egg and chicken meat production. Poultry rearing provides income and employment to large number of people. The objective of this investigation is to determine the performance of broiler chicken when fed with diets containing different combinations of energy and protein. Total of 200 (day-old chicken) broiler chickens of a commercial strain randomly selected for three different experiments and feeding with experimental rations. The birds rearing period was 6 weeks, the live body weight performance and health condition were measured by weekly. For each experiment Eighty (80) 1-day-old male broiler chickens of a commercial strain were selected in four groups with control including supplements diet treatments. Each treatment group of 20 birds was allocated. In the first and second weeks of feeding the body weight of broiler chicken was significantly increased by corn (starch rich supplements), however the body weight in week 4 and 5 was significantly increased by protein supplements particularly alfalfa. Also feed additives had significantly effect on growth performance where mortality rate was zero.
Biotechnology in Animal Husbandry, 2007
The aim of this work is to examine the influence of various systems of diet on production parameters of broilers from two different genotypes. The examination was done in a production farm for intensive fattening of broilers in R. Macedonia. Broilers from genotype Hubbard Classic and Cobb 500, 2400 one-day chickens all together sorted out in 16 separated and marked boxes have been used as a material. In each box were put 150 chickens, which contained four different treatments (two different hybrids x two diets) and four repetitions in one turns. Starter mixture was used during I-II weeks, grower for III weeks, then finisher 1 from IV-VI week, and finisher 2 for VII weeks of broilers fattening. Chemical structure of the first mixture (diet 1) had higher level of energy and proportion E:P, while the second mixture had higher level of proteins and lower values of proportion E:P. During the fattening the production parameters of the examining chickens: body mass, daily gain, feed consum...
Crude protein level of pre-starter diets and nutritive solution for broilers
Revista Brasileira de Zootecnia, 2011
The objective of the present study was to evaluate the effect of dietary crude protein (CP) levels and the use of a nutritive solution via drinking water on the performance of pre-starter broilers. A total of 1,224 male Avian Farm chicks, from one to 40 days of age were used. Birds were distributed in a completely randomized experimental design with a 3 × 2 × 2 factorial arrangement, consisting of three initial body weights (low: 41 g, standard: 45 g and high: 49 g; two crude protein levels at the pre-starter phase (22 and 25% CP),with or without the addition of a nutritive solution, whose nutritional level was similar to the 25% CP pre-starter diet, at a concentration of 5% of the drinking water. Each treatment included six replicates and 17 chicks per experimental unit. At the end of the pre-starter phase, all hens received a diet with 22% CP until day 21 and a diet with 20% CP from the 21 st to the 40 th day. The use of the pre-starter diet with higher nutritional levels and the nutritive solution enhanced broiler performance. The early nutrient supply via drinking water resulted in better broiler performance and uniformity. However, birds with low initial body weight continued to present lower body weight at market age.
The aim of modern poultry enterprise is to reduce feed cost for optimal economic returns because feed constitutes approximately 70% of the total production cost. One of way to reducing the feed cost is improvement in the feed efficiency of birds. While formulating a broiler’s diets, main emphasizes are placed on metabolize energy (ME) and crud protein (CP), because ME itself comprises 70% of the total cost of feed and protein have major cost components in broiler diets. Thus the present study was conducted to evaluate the performance of day old broiler chicks on various dietary proteins and energy levels for 35 days. A total of 2250, day old broiler chicks were divided into three groups having six replicates each. Three experimental diets; A, B and C formulated for starter phase contained 21.92, 21.35 and 21.35% CP and 3090, 3090 and 3034 Kcal/Kg ME, respectively. For finisher phase, A, B and C diets contained 20.79, 20.22 and 20.22% CP and 3118, 3118 and 3062 Kcal/Kg ME, respectively. With diets A, B and C overall weight gain remained 1376.29, 1364.61 and 1388.24 g/bird; feed intake was 2959.70, 2940.20 and 2991.64 g / bird and feed: gain ratio remained 2.15, 2.15 and 2.15, respectively. The results showed non-significant (P<0.05) effect of nutrient variability in diets on all growth parameters in birds. It was concluded that reducing CP by 0.50% in combination with 50 Kcal/kg ME gave better results in terms of cost of production and profit.
Poultry Science Annual Meeting Abstracts Poultry Science Association Volume 80, Suplement 1 Indianapolis, Indiana - USA July 24-28, 2001 710 Influence of source of energy of the pre-starter diet on performance and nutrient digestibility of broiler. M.J. Araníbar, M. I. Gracia, R. Lazaro*, and G. G. Mateos, Universidad Politécnica de Madrid, Spain. Abstract A trial was conducted to investigate the influence of different energy sources in the pre-starter diet on performance and nutrient digestibility of broiler chicks. There were five treatments and five replicates of four chicks per treatment. The experimental diets (0 to 10d) were based on corn and soybean meal and included either 6.8% of a fat source (sun-flower oil, fish oil or lard) or 15.0% of a carbohydrate source (starch or sucrose). The nutrient content of these diets was approximately 3,150 kcal AMEn/kg and 1.33% Lys for the fat diets and 2,920 kcal AMEn/kg and 1.23% Lys for the carbohydrate diets. From 10 to 21d all the birds received a common diet containing 3,000 kcal AMEn/kg and 1.33% Lys. Productive performance was measured at 10 and 21d and apparent fecal digestibility of crude protein (CPD) and crude fat (CFD), and the AMEn of the diets were determined at 4, 7, and 10d of age. No differences in performance were observed among treatments at 21d of age. As expected, birds fed the fat diets had similar body weight but better feed conversion (P<0.01) than broilers fed the carbohydrate diets at 10d of age. Apparent CPD and AMEn of the diets increased with age (48.3, 55.4, and 58.4%; P<0.001, and 2,637, 2,731, and 2,853 kcal AME/kg; P<0.001 at 4, 7, and 10d of age, respectively). Unexpectedly, apparent CFD decreased at 7d as compared to 4d (67.7 vs 76.4%; P<0.01) and then increased slightly at 10d of age (70.5%). The differences on CFD between 4 and 7d were more pronounced for fish oil (80.8 vs 58.4%; P<0.001) and lard (77.8 vs 62.3%; P<0.001) than for sunflower oil (84.7 vs 80.3%; P>0.05). We conclude that fat digestibility of chicks was lower at 7 than at 4 or 10d and that type and source of energy used from 0 to 10d does not influence broiler performance at 21d. Key Words: Broilers, Digestibility, Fat J. Anim. Sci. Vol. 79, Suppl. 1/J. Dairy Sci. Vol. 84, Suppl. 1/Poult. Sci. Vol. 80, Suppl. 1/54th Annu. Rec. Meat Conf., Vol. II